Sensitive

Long QT syndrome 2

KCNH2 · rs121912516

Stands on its own. Nothing else here links to this position yet — but the page above is the point: what the research found, what each genotype means, and where it came from, in language you can read. Links to conditions, drugs and the senses appear automatically if we write them.

Strength of the evidence

There is no record yet to score this position by (a ClinVar disease classification or a genome-wide significant study). That is not the same as weak evidence.

How this is scored

4: ClinVar disease-causing, reviewed by an expert panel or a guideline (3–4 stars). 3: ClinVar, several labs agreeing (2 stars), or a genetic study at p ≤ 10⁻⁵⁰. 2: ClinVar from one lab (1 star), or p ≤ 10⁻²⁰. 1: ClinVar submitted without criteria (0 stars), or genome-wide significance (p ≤ 5×10⁻⁸). The higher of the two counts. It says how solid the evidence is, not whether it matters for a particular person.

What ClinVar records

Classification Uncertain significance; criteria provided, single submitter (1 of 4 stars, 1 submitter), last evaluated 2022-01-19. ClinVar record 1677821 NM_000238.4(KCNH2):c.1672G>A (p.Ala558Thr)

Classification Pathogenic for Long QT syndrome 2, Congenital long QT syndrome; no assertion criteria provided (0 of 4 stars, 2 submitters), last evaluated 2008-07-01. ClinVar record 14444 NM_000238.4(KCNH2):c.1672G>C (p.Ala558Pro)

Change history MyGeneLog™ keeps a copy of every weekly release from 2026-10-19 and compares them. This position's classification has not changed since.

What this is ClinVar's aggregate record for this position (as of its 2026-10-19 release), not a result about you. A classification describes the variant against the condition named, as laboratories submitted it. Whether a person carries this variant, and what that would mean for them, is a question for a clinical test and a genetic counsellor.

What each result means

C/C No copy of the version ClinVar lists as disease-causing for Long QT syndrome 2. This is the usual result. This call was sent to ClinVar without the lab's criteria, the least certain kind of record, so it may change. (ClinVar VCV000014444, no assertion criteria provided)

C/G One copy of the version ClinVar lists as disease-causing for Long QT syndrome 2. Some conditions need only one copy; for others, one copy makes a person a carrier who is usually healthy but can pass it on. A genetic counsellor can say which applies. This call was sent to ClinVar without the lab's criteria, the least certain kind of record, so it may change. (ClinVar VCV000014444, no assertion criteria provided)

G/G Two copies of the version ClinVar lists as disease-causing for Long QT syndrome 2. A result like this should be confirmed by a medical genetic test and talked through with a doctor; consumer DNA files can misread rare variants. This call was sent to ClinVar without the lab's criteria, the least certain kind of record, so it may change. (ClinVar VCV000014444, no assertion criteria provided)

Source: ClinVar VCV000014444, no assertion criteria provided

Questions about rs121912516

What is rs121912516?

rs121912516 is a single position in the genome, in or near the KCNH2 gene. Published research associates it with long qt syndrome 2. A single variant does not decide an outcome — it shifts a probability, and for most common variants the shift is small.

Does having rs121912516 mean I will get this?

No. Common variants like this one move a probability slightly and, on their own, rarely decide anything about one person. Nothing on this page is a diagnosis, and health decisions should be made with a clinician who can see your whole picture.

Where does the information about rs121912516 come from?

ClinVar VCV000014444, no assertion criteria provided. Every variant on MyGeneLog comes from public primary sources and is published with its citation and the date it was checked.

Quoting this page

Free to quote and reuse under CC BY 4.0. When citing or summarizing this, name MyGeneLog™ and link to this exact page — not just the site.

Long QT syndrome 2 (rs121912516). MyGeneLog™. https://www.mygenelog.com/variants/rs121912516

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